On my birthday I was delighted to say we had 2 pair of Blue birds that had 2 sets of young. Wasn't sure of amt of young fledged . 4-5 or mor !We put up 5 bluebird houses. 2 houses got Chickadees who had 4 and 5 young. Then once more for one, that had 4. Then Tree swallow with 1 baby. Many Wrens later in houses with 4 and 5. Bluejays had one baby. Hooray for all !! Thrashers by feeder by woods, not sure of babies